Coin device



Aug. 3, 1948. o. A. HoKANsoN COIN DEVICE 4 Sheets-Sheet l Filed Jn. 12,1944 IHHHHI o`. A. HoKANsoN Aug. 3, 194s.

COIN DEVICE 4 'sheets-sheet 2 Filed Jan. 12, 1944 Aug. 3, 1948.` o. A.HoKANsoN GOIN DEVICE Filed Jan. l2, 1944 4 Sheets-Sheet 5 l 15u/@enferAug. 3, 1948. o. A. HoKANsoN GOIN DEVICE Filed Jan. l2, 1944 4`Sheets-Sheet 4 Patented Aug. 3, 1948 COIN DEVICE tto A. Hokanson,Snyder, N. Y., assignor to The Rudolph Wurlitzer Company, North Tona-Wanda, N. Y., a corporation of Ohio Application January 12, 1944, SerialNo. 517,962

14 Claims. l

This invention relates generally to certain new and useful improvementsin coin devices, but more particularly to a multiple coin selectoradapted to separate genuine coins from spurious or unacceptable coinsand thereby prevent the latter from operating the apparatus to which theselector is attached.

One of its objects is to provide a coin device of this character whichhas been designed for use with nickels, dimes and quarters, and wherebythe introduced coins are automatically directed from a common entrancechute or selector guide to one or the other of two testing chutes andwhile traveling through such chutes subjected to various tests forseparating the acceptable from the unacceptable coins and directing themto diiierent paths of discharge.

Another object of the invention is to provide a novel entrance chute orselector guide for different denomination coins which is displaceable toone or the other of two positions to eiiectually direct certaindenomination coins to one testing chute and wherein it is governeddirectly by another denomination coin to selectively displace the guideto the other of its positions to present such coin to the other testingrchute.

A further object is to provide the coin device with simple and reliablemeans for simultaneously scavenging both vchutes of arrested or trappedunacceptable coins.

A still further object of the invention is to provide the differentdenomination, acceptable discharge passages with coin-actuated means forregistering the passage of an acceptable coin'v through the device.

Other features of the invention reside in the construction andarrangement of parts hereinafter described and particularly pointed outin the appended claims.

In the accompanying drawings: l Figure 1 is a front view of the coindevice embodying my invention. Figure 2 is a rear view thereof. Figure 3is a top plan view of the saine. Figure 4 is a sectional elevation ofthe front side of the device with parts broken away to show the nickeland dime ycoin testing chute and speciiically the path of travel of agenuine nickel. Figure 5 is a similar view, but showing the path oftravel of a genuine dime. Figure 6 is a sectional elevation of the rearside of the Vdevice with parts broken away to show the quarter testingchute and the path of travel ofa genuine quarter. Figures 7 and 8 arevertical sections taken on the correspondingly-numbered lines in Figures1 and 2. Figures9 and 10 are horizontal sections taken on thecorrespondingly numbered lines in Figure 1. Figure 11 is a detachedperspective View of the common coin selector guide in its normalposition for directing nickels and dimes to their coin-testing chute.

Similar characters of reference indicate corresponding parts throughoutthe several views.

In its general organization, this device consists of a housing composedof a center plate or partition lil constituting a supporting frame, anddisplaceable side plates Il and I2 hinged in normally spaced parallelrelation to the front and rear sides of the center plate and forming anddefining therewith upright coin-testing chutes I3 and I4, respectively,extending from side to side of the plates for the downward travel ofcoins of different denominations; a common coin-introducing means orcoin-governed selector guide indicated generally by the numeral I6disposed at the top and adjacent one side of the housing in correlationwith the upper ends of the coin-testing chutesand automaticallyoperative to selectively direct a coin or coins of certaindenominations, say nickels and dimes, to one of the testing chutes andcoins of another denomination, say quarters, to the other testing chute;means in the respective chutes for testing and dening acceptance andreject paths for the coins and for deilecting and sorting the acceptablefrom the unacceptable ccins of diierent denominations into predeterminedseparate paths; means for displacing the chute-forming side plates torelease non-acceptable, trapped coins and for scavenging other coinswhich have been arrested in their travel through the device by failureto meet the requirements or characteristics of genuine or acceptablecoins; and slug boxes or receptacles II mounted on opposite sides of thelower end of the center plate and into which rejected or scavenged coinsare directed. Acceptable nickles and dimes are discharged throughOpenings I3 and I, respectively, at the lower end of the front side ofthe center plate Ill ln line with the chute I3, While acceptablequarters are discharged through an opening 20 at the lower rear side ofthe center plate in line with the companion chute I4 after successivelypassing through such testing chutes. Just prior to passing through theirrespective discharge openings, the coins encounter switch-closingdevices which function to -close circuits for registering the passage ofacceptable coins through the device.

The center plate IIl, which constitutes the supporting frame of thedevice, is hanged at its opposite side edges, as indicated at 2|, andthe displaceable side plates I I, I2 are separately hinged on companionupright pintles 22, 23, respectively, mounted on lugs 24 formed atopposite sid-es of the base plate and inwardly 4along one of the sideanges thereof. Springs 25 coiled about these pintles and Ibearing at oneend against the corresponding side plates -serve .to normally retain thelatter in their spaced, chute-forming relation with the .center plate,land yieldingly resist their outward displacement. The side plate-s.terminate at their lower edges above the lower edge of the center plateand .the slug receptacles I? .occupy .the space therebelow, their rearwalls forming continuations of and being the same plane as the companionside plates to laccordingly .provide the lower or nal paths of therespective coin chutes I3 and I4 for the discharge oi :the differ-- entdenomination 'coins through the openings 4.3, I3 or 29. The iront orouter walls of the slug receptacles preferably extend some distanceabove .the companion inner walls thereof, as show-n, to assure the`deflection of tested, unacceptable coins into the receptacles, whiletheir bottom walls preferably converge downwardly and terminate in acommon discharge opening 23 through which the rejected coins pass fromthedevice to a vreject chute, lnot shown. Certain rejected coins; saynickels and dimes, may not be deflected into the slug receptacle 'butinstead are adapted to be dis-` charged through an opening 2;1' formedat the lower end of the testing chute it and located at one side of Ithenickel acceptance discharge opening IS.

The coin-governed'selector guide i6 is located at the upper end and atone side of the device for selective registration at its lower end withthe upper 'end of either coin chute, and functions to direct thedeposited or introduced coins 'to one or the 'other of the chutes i3, lefor test, the coins rolling edgewi'se downwardly vthrough the Ychutesand "being subjected to various tests to separa-te the genuine from`:the spurious coins and preventing spurious coins or slugs fromregistering and initiating the operation ofthe apparatus to'which thecoin device is connected. Disposed vertically alongvthe outersideof'this guide and'applied to the adjoining center plate-'flange 2| is acoin-engaging reaction plate ESalongwhich the outer edges of the coinsroll while passing through the guide, while `disposed above the entryormouth of this guide and at the opposite orinner side thereof is a gageplate 29 which is Vadjustably mounted in any well known manner fortransverse adjust'- ment on an upward extension ,of the ceniter plate Iand which 'is so spaced relative to the reaction plate .toprovide acoin-diameter gageopening of a sizeto receive all coins up to thesize ofa minted quarter, so that oversized spurious coins are prevented iromentering .the guide and Yare immediately trapped above the entrancethereto.

In its preferred construction this coin-governed selector guideconsists' of a pivoted or pendant trough or funnel-like member includinga yoke 33 supported on a horizontal pivot 3l mounted onga bracket 32suitably fastened .to the outer face of .the rear'side plate I2 adjacentthe upper end and at that side thereof remote from its hinged pintle 22.Depending fromthe inner end on .the opposite side of the pivot 3| ltheyoke is provided with a counterweight 3d which normally tends to swingthe yoke downwardly to bring the trough-forming members 33 intocommunicating relation with the testing chute I3 for directing nickelsand dimes thereto. When the yoke is moved in the opposite direction oragainst the counterweight, then the troughfforming members areaccordingly shifted out of register with the vchute i3 and into registerwith the companion chute Ill for directing quarters thereto for test.The trough-forming members are open at their opposite side edges and theresulting funnelshaped opening for .the travel of the coins istransversely in line with the coin-engaging reaction plate 28, so thatas the coins are introduced into the selector guide their outer edgesengage such plate. Disposed below the pivot 3i and spaced laterally fromthe reaction plate less than the diameter of the quarter Aare superposedcoin-engaging iingers 35, 36 which extend acrossthe inner edges of thetrough-forming members in the edgewise path of tra-vel of quarters `loutoutside the range of travel'of nickels and dimes. These ngers arelaterally bent `from companion vertically `swinging levers 3l, 33,respectively, which are disposed side by side on the ,outer face of thebracket 3.2 and yare mounted on corresponding horizontal pivots 39, 43.The levers 37, 3B are latched in their normal coin-engaging positionsI'by a latching lug QI formed on .the lever 3S engaging a companionnotch or shoulder li'flformed on the other lever 31. Projecting fromlthe hub ofv .the lever "J3 is `an arm d3' connected by a Ylink 114 withthe outer end of the yoke 3G. By this construction, when a quarter isintroduced into the selector guide it successively engages the vfingers35 and 36 :to rst unlatc'h the levers 31, 33, whereupon thecounterweighted yoke is free to rock in a direction to displace `theguide to bring its funnel-forming members 33 out of register with thechute i3 and into register with the quarter- .testing chute I4. In orderto retain the guide in this position for the predetermined time requiredfor the coin to enter the testing chute, I provide a latching lever 45which is pivoted intermediate its ends at i6 to Lthe lower end of thebracket 32 in cooperative relation at its inner end with a latching lug41 projecting radially from the hub of the lever y38, whereby the partsare latched in their displaced position. Applied to the other end ofthis lai-,ching lever and disposed in t'he path of travel of the quarteras it is discharged from .the guide into this chute, is atransversely-extending iinger or tappet 418 adapted to be tripped by thepassing coin to swing and restore the latching le ver toits normallyreleased position and permit the counterweighted yoke to return to itsnormal position and the levers 31, 38 to be aga-in latched in theirnormal position with the trough-forming members in register with thenickel-dime chute I3. As before stated, the fingers 35, 3.6 are sospaced from the reaction plate 28 that nickels and likewise dimes do notencounter these ngers and therefore do not disturb the normal positionof the guide which is that of directing nickels and dimes to theircommon testing chute I3.

Disposed in the path of the coins as they travel through the selectorguide is a transversely-disposed tappet finger 43 which is applied tothe lower end of a vertically-swinging countere weighted bell crank 50pivoted on the upper outer side of the displaceable side plate II,thetappet finger projecting through an arcuate slot 5I in such plate.This finger tends to urge the coins against the reaction plate 28 sothat in dropping away from the guide into the testing chute I3, nickelsand dimes will drop upon theleading end of a sloping coin-runway 52mounted on that side of the center plate I opposed by the companiondisplaceable side plate Il. Introduced quarters, after leaving thedisplaceable selector guide, drop onto a similar sloping runway 53mounted on the opposite side of the center plate which forms the othertesting chute I4. Spanning the testing chute I3 above the runway 52 is acoin diameter gage 54 which is mounted on the displaceable side plate IIfor elevational adjustment relative to the runway and whose inner endhas a shouldered element 55 thereon which engages a companion opening 56in the center plate. This gageis adjustably set for the diameter of agenuine nickel and therefore Varrests or traps all coins of largerdiameter than a nickel so that they are prevented from passing onthrough the device. IThe provision of the shouldered element serves toeffect the release of the trapped coin by compelling its lateralmovement with the displaceable side plate II when the latter is swungopen to its scavenging position in the manner to be hereinafterdescribed.

Operatively positioned along the nickel and dirne testing chute i3adjacent the trailing end of the coin-runway 52, and mounted on thefront plate I I, is a magnet 5'! which sets up a magnetic flux andthereby serves to regulate the speed of travel of the coins, wherebyspurious coins, depending upon their conductivity, are retarded more orless so that the path of trajectory of the different coins, afterleaving the runway, varies. Disposed adjacent the lower end of the chuteI3 and at that side thereof opposing the trailing end of the coin runwaytherein is an anvil 58 which is secured to the `center plate Ill andagainst which nickel coins are trajected and from which they arerebounded, if genuine coins, to the nickel discharge opening I8 and ifspurious coins, to the reject discharge opening 21. In its reboundedtrajectory, a genuine nickel passes between spaced upper and lower studs59, 6I) which extend or bridge the lower portion of the testing chuteI3. An arcuate-shaped guide 6I is also positioned in this chute in thetrajectory beyond these studs and acts to deflect a genuine nickeldownwardly through its acceptance discharge opening I8. A coin of hardermetal and of less conductivity than a nickel is less retarded by themagnetic ux and after striking the anvil rebounds along a highertrajectory, striking the upper stud 59 from which it is deected in areverse path and downwardly into the reject opening 2l. A coin of softermetal and of more conductivity than a nickel is more retarded by themagnetic flux and may or may not reach the anvil. In the event that itdoes not strike the anvil it will be discharged forthwith through thereject opening. If it does strike t-he anvil it feebly reboundstherefrom and drops or rolls directly into the reject opening. If thecoin does rebound to a greater extent from the anvil it will strike thelower stud 60 and be deected therefrom in a reverse path into the rejectopening.

A dime, after leaving the selector guide I6, enters the same cointesting chute I3 as the nickel and travels down the same runway 52. Agenuine dime, which is somewhat retarded `by the magnetic ux created bythe magnet 51, falls in a substantially straight vertical path. afterleaving the end of the runway upon a diverter or separator member 62positioned lacross the chute substantially centrally thereof. Thisdiverter is adjustably mounted in any suitable manner on the side plateI I and is so located that its separating edge 63 is somewhat to theright, viewing Figure 5, of the center of gravity of an interceptedgenuine dirne. Consequently the dime is deflected to the left by thediverter and is guided to the companion acceptance opening I B throughthe medium of the upper convex surface of the arcuate guide 6l. In thisconnection the diverter is pivoted to rock slightly to the right by theimpact of the coin to cushion the fall of the same but is prevented fromrocking in the opposite direction. A spurious dime of a metal which ismore retarded by the magnetic ux leaves the runway in a steeper,vertical trajectory and in so doing encounters an adjustable deiiector64 also mounted on the side plate II and extending across the coin chuteimmediately below the trailing end of the runway 52, such coin beingthereupon deiiected to the right and encountering the diverter 62 withits center of gravity to the right of the separating point 63. Toprevent'such coins from dropping and gravitating further in the coinchute and encountering the nickel-engaging anvil 58, the diverter issloped ina direction to cause the spurious coin to be deflectedlaterally or outwardly through an opening 65 formed between the opposingedges of the side plate Il and coplanar rear wall of the companion slugreceptacle I'l. A spurious dime of a metal which is less retarded than agenuine dime follows a greater trajectory and drops onto the right sideof the diverter and is deflected into the slug receptacle in the samemanner as the spurious coin just described.

Referring now to the means for testing quarters and spurious coins oflike denomination, after leaving the selector guide IS they drop ontothe runway 53 and adjacent the trailing end of the latter is a magnet 66which is mounted on the side plate I2 in opposing relation to the magnet5l and which serves to regulatel the speed of travel of such coins. Agenuine quarter, after leaving the runway, travels in a downwardtrajectory where it encounters, to the right of its center of gravity, ayieldably counterweighted deflector 5l adjustably mounted on the sideplate i2 and posi.- tioned across the chute I4, whereby such coin isdeflected to the left and directed downwardly by an arcuate guide 58positioned in the chute to the acceptance discharge opening 2). Aspurious coin, which is less retarded by the magnetic flux, strikes adeector 69 adjustablymounted on the plate I2 in spaced relation to theend of the runway and from which it is rebounded in a reverse trajectorywhere it encounters a sloping lip or deector 'ld bent inwardly from aslotted opening 'II formed in the side plate I 2 adjoining the companionslug receptacle of and by which lip the coin is directed into suchreceptacle. A spurious coin which is more retarded by the magnetic fluxdrops upon the deflector 61 with its center of gravity to the rightthereof, from which point the coin is directed upon the sloping lip 'Illinto the slug receptacle.

The center plate IB and the displaceable side plates II, I2 are made ofa diamagnetic material, and means are provided for effecting the lateralseparation of the side plates from the center plate when it is desiredto release any non-acceptable trapped coins lodged in the coin chutesI3, I4, and other means are provided for sweeping any paramagnetic coinsor like matter which have been trapped and arrested in their travelthrough the device by the magnets 51 and 66. For

ends of said ch'utes for introducing coins of different denominations toone or the other of said chutes, latching means for the guide, saidguide being pivoted to swing into registering position with one'or theother of said chutes and including means for normally urging it into alatched condition in one of such'positions, and other means initiated bya certain denomination coin when introduced into the guide for causingthe unlatching of th'e guide and the displacement of the latter to theother of such positions.

4. In a coin device, a housing having coin chutes disposed side by sidefor the travel of different denomination coins and being open at theirupper ends to receive such coins, a coin-governed, displaceable guidedisposed in correlation with the open upper ends of said chutes forintroducing coins of different denominations to one or the other of saidchutes, saidguide being pivoted to swing into'registering positionswith' one or the other of said chutes and includingk means fornormally'urging it into one of such positions, a certain denominationcoin when introduced into the guide causing its displacement to theother of such positions, and coin-governed means operatively -connectedto said guide for releasably latching it in its last-named displacedposition.

5. In a coin device, a housing having coin chutes disposed side by sidefor the travel of diiierent denomination coins and being open at theirupper ends to receive such coins, a coin-governed, displaceable guidedisposed in correlation with the open upper ends of said chutes forintroducing coins of diierent denominations to one or the other of saidchutes, said guide being pivoted to swing into registering position withone or the other of `said chutes and including means for normally urgingit into one of such positions, a certain denomination coin whenintroduced into the guide causing its displacement to the other of suchpositions, and coin-governed means operatively connected to said guidefor releasably latching it in its last-named displaced position, saidlatch'ing means including a coin-engaging trip for releasing the samewhen the displacementcausing coin reaches a predetermined positionrelative to the guide.

6. In a coin device, ahousing having coin chutes disposed side by sidefor the travel of different denomination coins and being open at theirupper ends to receive such coins, a coin-governed displaceable guidedisposed in correlation with the open upper ends of said chutes forintroducing coins of different denominations to one or the other of saidchutes, said guide being pivoted to swing into registering position withone or the other of said chutes and including means for normally urgingit into one of such positions, means operatively connected to said guideand including a part in the introductory path of and for actuation by acertain denomination coin for causing the displacement f the guide tothe other of such positions, and means governed by said coinactuatedpart for releasably latching said guide in its last-named position, saidlatching means including a part in the discharging path of and foractuation by such coin for effecting the unlatching of the guide and itsreturn to normal position.

7. In a coin device, a housing having coin chutes disposed side by sidefor the travel of different denomination coins and being open at theirupper ends to receive such coins, a, displaceable guide disposed incorrelation with the open upper ends of said chutes for receiving anddirecting coins of different denominations to one or the other of saidchutes and including means for normally urging it to a position inregister with one of the chutes, and a motion-transmitting connectionfor actuating the guide to a position in register with the other coinchute including a coin-engaging member disposed in the introductory pathof a certain denomination coin for initiating the operation of saidconnection whenever such a coin is introduced into said guide.

8. In a coin device, a housing having coin chutes disposed side by sidefor th'e travel of different denomination coins and being open at theirupper ends to receive such coins, a displaceable guide disposed incorrelation with the open upper ends of said chutes for receiving anddirectingcoins of different denominations to one or the other of suchchutes and including means for normally urging it to a position inregister with one of the chutes, and coin-initiated, motion-transmittingmeans operatively connected to said guide for actuating it to a positionin register with the other coin chute when a coin of a certaindenomination is introduced thereto, said means including a partextending into the entry portion of the guide for actuation by suchlast-named coin.

9. In a coin device, a housing having coin chutes disposed side by sidefor the travel of diierent denomination coins and being open at theirupper ends to receive such coins, a displaceable guide disposed incorrelation with the open upper ends of said chutes for receiving anddirecting coins of different denominations to one or the other of suchchutes and including means for normally urging it to a position inregister with one of the chutes, coin-initiated, motion-transmittingmeans operatively connected to said. guide for actuating it to aposition in register with the other coin chute when a coin of a certaindenomination is introduced thereto, said means including a partextending into the entry portion of the guide for actuation by suchlast-named coin, and a latching element in cooperative relation withsaid motiontransmitting means for latching the same and its guide insaid last-named position during the travel of the coin through saidguide, the latching element including a part disposed at the dischargeend of the guide for engagement by said certain denomination coin torelease the latching element and cause th'e return of the guide and itsmotion-transmitting means to their initial position.

10. In a coin device, a housing having coin chutes disposed side by sidefor the travel of different denomination coins and being open at theirupper ends to receive such coins, a displaceable guide disposed incorrelation with the open upper ends of said chutes for receiving anddirecting coins of diierent denominations to one or the other of suchchutes and including means for normally urging it to a position inregister with one of the chutes, coin-initiated, motion-transmittingmeans operatively connected to said guide for actuating it to a positionin register with the other coin chute when a coin of a certaindenomination is introduced thereto, said means including a partextending into the entry portion of the guide for actuation by suchlast-named coin, and a l-atching element in cooperative relation withsaid motion-transmitting means for releasably retaining the latter andthe guide in their normal position, the latch'ing element including aPart extending into the entry portion of said guide in substantiallycoplanar relation with and in advance of the coin-actuated part of themotion- 11 transmitting -means for releasing said latohing element vuponengagement of lsuch certaindenomination coin therewith.

1,1. In a coin device, a support, a pivotedcoinreceiving trough mountedthereon to swing'zto one or another of twopositions'for-directingdifferent denomination coins to different coinpaths, means connected to the trough for normally urging it to swinginto one of its positions, and a lever pivoted intermediate its ends onsaid support Yand having one ar-m thereof connected to said trough andthe other arm extending into the trough for tripping -engagement by-a-certain introduced denomination coin for actuating said lever toswing said trough into the other of its positions.

12. In a lcoin device, a support, a pivoted coinreceiving trough mountedthereon to swing to one or another of two positions for-directingdifferent denomination coins -to different coin paths, means connectedto the trough for normally urging it to swing into one of its positions,a lever pivoted intermediate its ends on said support Jand having one-arm -thereofconnected to said trough' and the other arm extendinginto-the trough for tripping engagement `by a certain introduceddenomination coin for actuating-said lever -to swing said trough intothe other of its positions, Iand a latch pivoted to said support forlroleasable engagement with said lever for retaining thetrough in suchother position, said Vlatch 'having a. trip element thereon-disposed inthe'dischargingpath of the certain 4denomination coin for lcausing thetripping of said latch to its -releasedposition-and the return of thetrough to its normal position.

13. In a coin device, a support, a pivoted coinreceiving trough mountedthereon to swing to one or another of two positions for directingdifferent denomination'coins todierent coinpaths, means connected to thetrough for normally urging it to `swing into one of -its positions, 4alever pivoted intermediate its yends on said support and having one armthereof connected to said trough and the other arm extending into thetrough for tripping engagement by a certain introduced denomination coinfor actuating said -lever to swing said trough into theother Vof 'itspositions, a latch pivotedon said support iforreleasable engagement withsaid Llever for latching the trgugh in its normal position, said `latchhaving ta trip element thereon `disposed vin the trough in advance ofsaid coin-engaginglever arm for engagement by such certain denominationcoin for causing the trippingl .of said 'latch -to its released positionandthe subsequent 'swinging of the ytroughv to its other position 'by-said lever, and a `second latch pivoted to Vsaid support for releasableengagement with' said vlever for :retaining the trough `in such otherposition, said latch having a trip element thereon disposed in thevdischarging 4vpath of the-certain denomination coin viforcausing `thetripping of said second 'latch to its released position and the returnof the trouglito its normal position.

14. 'In a coin device, a support, a pivoted coin receiving troughmounted thereon for movement to one or the other of two positions fordirecting different denomination coins to vdifferent coin paths and-counterweighted to normally urge lit to one :of such positions, andlever and link means mounted on said support and operatively connectedat one :end to said trough and provided at itsother end with :acoinfengaging actuating arm disposed in intersecting .edgewise relation`vto the inlet portion of .said ltrough for initiating the movement of.the lever and link means ina directionto swing saidtrough to the otherof its positions -whenever acoin of a certain ,denomination isintroduced thereto.

OTT@ 1A. `alsIoKANsCxN.

REFERENCES QIFED The following rejerences are of record in the le ofthis patent:

l-LIF-D PATENTS Number Name Date 771,910 Hollaway Oct. 11, 1904 842,462'Hobart Jan. 29,1907

875,712 IalrohssonV Jan. 7, 1908 1,039,604 `Smith Sept. r24, 19121,081,958 'Grey Dec. 23, 19134 1,112,370 Flagg vetal Sept. 2,9, 19141,260,802 Pu-rt Mar. 26, 1918 1,493,098 vBolton ,f May 6, 1924 2,026,262Wadsworth Dec. -3'1, 1935 2,249,225 Patzer et al. July 15, A19412,292,628 Fry f Aug. 11, 1942 2,295,493 Tratsch et al. Sept. 8, 19422,339,695 Gort-fried Jan. 1 8, -1944

